His Birthday in the book and original film (Called Willy Wonka and the Chocalate Factory(Gene Wilder is amazing))anyway .Not sure about the awful remake Johnny Depp is actually bad in it.But surely even a one off plot device refering too christams is a lot less than an entire film set at christmas

'There is no future for e-books, because they are not books. E-books smell like burned fuel.'Ray Bradbury (RIP)